#include "stdafx.h"
#include "comcat.h"

// Helper function to create a component category and associated
// description
HRESULT CreateComponentCategory(CATID catid, WCHAR* catDescription)
{
        ICatRegister* pcr = NULL ;
        HRESULT hr = S_OK ;

        hr = CoCreateInstance(CLSID_StdComponentCategoriesMgr,
                                           NULL,
                                           CLSCTX_INPROC_SERVER,
                                           IID_ICatRegister,
                                           (void**)&pcr);
        if (FAILED(hr))
                return hr;

        // Make sure the HKCR\Component Categories\{..catid...}
        // key is registered
        CATEGORYINFO catinfo;
        catinfo.catid = catid;
        catinfo.lcid = 0x0409 ; // english

        // Make sure the provided description is not too long.
        // Only copy the first 127 characters if it is
        int len = wcslen(catDescription);
        if (len>127)
                len = 127;
        wcsncpy(catinfo.szDescription, catDescription, len);
        // Make sure the description is null terminated
        catinfo.szDescription[len] = '\0';

        hr = pcr->RegisterCategories(1, &catinfo);
        pcr->Release();

        return hr;
}

// Helper function to register a CLSID as belonging to a component
// category
HRESULT RegisterCLSIDInCategory(REFCLSID clsid, CATID catid)
{
 // Register your component categories information.
        ICatRegister* pcr = NULL ;
        HRESULT hr = S_OK ;
        hr = CoCreateInstance(CLSID_StdComponentCategoriesMgr,
                                           NULL,
                                           CLSCTX_INPROC_SERVER,
                                           IID_ICatRegister,
                                           (void**)&pcr);
        if (SUCCEEDED(hr))
        {
                // Register this category as being "implemented" by
                // the class.
                CATID rgcatid[1] ;
                rgcatid[0] = catid;
                hr = pcr->RegisterClassImplCategories(clsid, 1, rgcatid);
        }

        if (pcr != NULL)
                pcr->Release();

        return hr;
} 